'Rahtiz says, "The kobolds will be charging down this passage here. I'll only have time to fire a few arrows before they close to melee. Venture into the tunnels beyond and bring me one more arrow; it might just save my life. The kobolds typically leave extra ammunition in the barrels throughout the mines. Break a few of them open and you'll likely find some arrows we can use."

(Hint: To open the barrels you can destroy and then loot the arrows from the wreckage.)